151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Device Redirection Virtual Channel
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*
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* Copyright 2010-2011 Vic Lee
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* Copyright 2010-2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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* Copyright 2015 Thincast Technologies GmbH
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* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <winpr/crt.h>
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#include <winpr/stream.h>
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#include "rdpdr_main.h"
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#include "devman.h"
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#include "irp.h"
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT irp_free(IRP* irp)
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{
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if (!irp)
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return CHANNEL_RC_OK;
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Stream_Free(irp->input, TRUE);
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Stream_Free(irp->output, TRUE);
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_aligned_free(irp);
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return CHANNEL_RC_OK;
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}
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/**
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* Function description
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*
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* @return 0 on success, otherwise a Win32 error code
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*/
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static UINT irp_complete(IRP* irp)
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{
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size_t pos;
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rdpdrPlugin* rdpdr;
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UINT error;
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rdpdr = (rdpdrPlugin*)irp->devman->plugin;
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pos = Stream_GetPosition(irp->output);
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Stream_SetPosition(irp->output, RDPDR_DEVICE_IO_RESPONSE_LENGTH - 4);
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Stream_Write_UINT32(irp->output, irp->IoStatus); /* IoStatus (4 bytes) */
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Stream_SetPosition(irp->output, pos);
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error = rdpdr_send(rdpdr, irp->output);
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irp->output = NULL;
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return irp_free(irp);
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}
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IRP* irp_new(DEVMAN* devman, wStream* s, UINT* error)
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{
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IRP* irp;
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DEVICE* device;
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UINT32 DeviceId;
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if (Stream_GetRemainingLength(s) < 20)
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{
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if (error)
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*error = ERROR_INVALID_DATA;
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return NULL;
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}
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Stream_Read_UINT32(s, DeviceId); /* DeviceId (4 bytes) */
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device = devman_get_device_by_id(devman, DeviceId);
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if (!device)
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{
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WLog_WARN(TAG, "devman_get_device_by_id failed!");
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if (error)
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*error = CHANNEL_RC_OK;
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return NULL;
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}
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irp = (IRP*)_aligned_malloc(sizeof(IRP), MEMORY_ALLOCATION_ALIGNMENT);
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if (!irp)
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{
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WLog_ERR(TAG, "_aligned_malloc failed!");
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if (error)
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*error = CHANNEL_RC_NO_MEMORY;
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return NULL;
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}
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ZeroMemory(irp, sizeof(IRP));
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irp->input = s;
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irp->device = device;
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irp->devman = devman;
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Stream_Read_UINT32(s, irp->FileId); /* FileId (4 bytes) */
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Stream_Read_UINT32(s, irp->CompletionId); /* CompletionId (4 bytes) */
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Stream_Read_UINT32(s, irp->MajorFunction); /* MajorFunction (4 bytes) */
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Stream_Read_UINT32(s, irp->MinorFunction); /* MinorFunction (4 bytes) */
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irp->output = Stream_New(NULL, 256);
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if (!irp->output)
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{
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WLog_ERR(TAG, "Stream_New failed!");
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_aligned_free(irp);
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if (error)
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*error = CHANNEL_RC_NO_MEMORY;
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return NULL;
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}
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Stream_Write_UINT16(irp->output, RDPDR_CTYP_CORE); /* Component (2 bytes) */
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Stream_Write_UINT16(irp->output, PAKID_CORE_DEVICE_IOCOMPLETION); /* PacketId (2 bytes) */
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Stream_Write_UINT32(irp->output, DeviceId); /* DeviceId (4 bytes) */
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Stream_Write_UINT32(irp->output, irp->CompletionId); /* CompletionId (4 bytes) */
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Stream_Write_UINT32(irp->output, 0); /* IoStatus (4 bytes) */
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irp->Complete = irp_complete;
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irp->Discard = irp_free;
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irp->thread = NULL;
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irp->cancelled = FALSE;
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if (error)
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*error = CHANNEL_RC_OK;
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return irp;
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}
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